Foxtail Barley, originally native to the temperate regions of North America, has widened its reach significantly. This plant is now found across multiple continents, including Europe, Asia, and South America, in addition to Oceania. While it grows naturally, foxtail Barley has also been cultivated, indicating its adaptation beyond its native range. Its proliferation spans from temperate to arctic zones, adapting to a variety of climates.

Foxtail Barley originates from North America, a hardy species accustomed to diverse conditions and environments. This plant is termed a weed due to its aggressive and invasive nature, often outcompete native plants for the same resources such as light, nutrients, and water. Its wind-borne seeds can spread over large areas, making control measures challenging and enabling fast infestation. Gardeners beware, foxtail Barley is not only a nuisance but presents a physical danger; its sharp, barbed awns can cause injury to humans and pets and may deeply embed into the skin causing infections. Foxtail Barley is a perennial plant, maintaining its roots year-round and producing new growth each season, adding to its tenacity and quick-spreading nature. Key identifiers include its fluffy, feather-like spikes which change from green to purplish, finally adopting a straw-like hue as it matures. Its primary method of spread is through wind dispersal of its abundant seeds.

The best season to control or remove foxtail Barley is usually in the spring, before the plant sets seed and spreads further. Removing foxtail Barley before it reaches maturity is critical to prevent additional spreading.